[8u60]: request for approval: backport of 8076419: Path2D copy constructors and clone method propagate size of arrays from source path

[Phil Race]

Bug: https://bugs.openjdk.java.net/browse/JDK-8076419

8u review : 
http://mail.openjdk.java.net/pipermail/2d-dev/2015-May/005391.html

webrev : http://cr.openjdk.java.net/~prr/8076419.8u/ 
<http://cr.openjdk.java.net/%7Eprr/8076419.8u/>

JDK9 changeset : http://hg.openjdk.java.net/jdk9/client/jdk/rev/9e9588daa10c

-phil.